Not required., 2 mm circular., 2 mm rectangular., 3 mm circular (17 mm)., 3 mm rectangular (17 mm)., 4.5 mm circular (17 mm)., 4.5 mm rectangular (17 mm)., 4.5 mm circular., 4.5 mm rectangular., 6 mm circular., 6 mm rectangular., 8 mm circular., 8 mm rectangular., 10 mm circular., 10 mm rectangular., As drawing.